kabandhÄs tatra cotpetuḥ
patita-sva-śiro-'kṣibhiḥ
udyatÄyudha-dordaṇá¸air
ÄdhÄvanto bhaá¹Än má¹›dhe
kabandhÄḥ - trunks (bodies without heads); tatra - there (on the battlefield); ca - also; utpetuḥ - generated; patita - fallen; sva-Å›iraḥ-aká¹£ibhiḥ - by the eyes in one's head; udyata - raised; Äyudha - equipped with weapons; dordaṇá¸aiḥ - the arms of whom; ÄdhÄvantaḥ - rushing toward; bhaá¹Än - the soldiers; má¹›dhe - on the battlefield.
It appears that the heroes who died on the battlefield immediately became ghosts, and although their heads had been severed from their bodies, new trunks were generated, and these new trunks, seeing with the eyes in the severed heads, began to attack the enemy. In other words, many ghosts were generated to join the fight, and thus new trunks appeared on the battlefield.